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Select the triad which follows the same pattern as that followed by the two triads given below. Both triads follow the same pattern. HE-JG-LNMJ-OL-QS
PM-RO-TU
QN-SP-UW
OL-QN-ST
RO-TQ-VW
QN-SP-UW
Observe the progression of indices: the second letter increases by 2 to become the first letter of the next pair, and the difference between letters in each pair is consistently +2, +2, +2.
Observe the progression of indices: the second letter increases by 2 to become the first letter of the next pair, and the difference between letters in each pair is consistently +2, +2, +2.
Analyze the pattern in HE-JG-LN
HE (H=8, E=5, difference -3), JG (J=10, G=7, difference -3), LN (L=12, N=14, difference +2). Wait, let's re-examine: H(8) to J(10) is +2, E(5) to G(7) is +2. Between pairs: E(5) to J(10) is +5, G(7) to L(12) is +5.
Analyze the pattern in MJ-OL-QS
M(13) to O(15) is +2, J(10) to L(12) is +2. O(15) to Q(17) is +2, L(12) to S(19) is +7. Correct logic: Pair 1 (X, Y) тЖТ Pair 2 (X+2, Y+2) тЖТ Pair 3 (X+4, Y+7). Re-evaluating: HE(8,5) тЖТ JG(10,7) тЖТ LN(12,14). Pattern: First letter (+2, +2), Second letter (+2, +7).
Apply pattern to determine the correct triad
The correct pattern follows: First letter of each pair increases by 2 (H тЖТ J тЖТ L, M тЖТ O тЖТ Q). The second letter increases by 2 (E тЖТ G, J тЖТ L) then by 7 (G тЖТ N, L тЖТ S). Looking at QN-SP-UW: Q тЖТ S(+2), N тЖТ P(+2). S тЖТ U(+2), P тЖТ W(+7). This matches the sequence increment (+2, +2) and (+2, +7).
A: PM-RO-TU does not follow the +2, +7 increment for the second character. C: OL-QN-ST is inconsistent with the jump pattern. D: RO-TQ-VW fails the required letter intervals.
B is correct because the sequence follows a pattern where the first letter increases by 2 in each pair (Q to S to U) and the second letter follows a pattern of +2 then +7 (N to P to W).
In letter-triad series, always check the difference between the first letters of all pairs first, then check the second letters; most questions rely on simple addition/subtraction sequences.
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